Transmission v-belt



June 5, 1923., l ,57,569

H. M. GUSDORF TRANSMISS I ON V-BELT Filed May 25. 1921 m"w"w"mw l l 7 ,f 2 7 4 Patented June 5, 1923.

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HAROLD M. GUSDORF, OF INDIANAPOLIS, INDIANA.

TRANSMISSION V-BELT.

Application led May 25, 1921. Serial No. 472,336.

To aZZ whomz't may concern.'

Be it known that I, HAROLD M. GUsDoRF, a citizen of the United States, residing at Indianapolis, in the county of Marion and n will then slip and the power transmitted is Yhollow V, havin correspondingly reduced.

The object of this invention is to provide a belt which is of a grooved or hollow V- shape in cross section, and which has an elastic surface with cup-like indentations on the'gmove-contacting side, and a firm and more unyielding opposite surface, within the a tendency to flatten out and 'thereb yie din ly force 'i the, belt into contact wit both si es of the groove of the pulley without destroyin the contact of the belt against the bottom o the groove.

uct obtained by properl tanning hog-skin in a manner to-secure tlie above described properties and to provide means for making a continuous belt of any required length out of a plurality of comparatively short strips of hog-skin.

I accomplish the above, and other objects which will hereinafterappear, by the means illustrated in the accdmpany'ing drawing, in which- Fig. 1, is a longitudinal section of two strips of hog-skin, with adjacent ends beveled preparatory to uniting them by a lapjoint. Fig. 2, shows the same strips, with their ends 'oined. Fig. 3, is an under side view of ali e jointed belt in the flat. Fig. 4, is a view in cross section of my1 V belt on a grooved ulle and Fig. 5,'is a longitudinal section of) the 1t on the pulley which is also shown in section..

Like characters of reference indicate like parts in the several views of the drawing- My improved V-belt is formed from a material in the Hat, having a surface 6, more or less elastic in its nature, pitted with numerous cup-like depressions 7 The opposite surface 8, is much firmer and unyielding, because of a more compacted fibrous condition and the near or complete absence o f the cups. This material may be artificxally made in its entirety, but in practice I have found that hog-skin properly tanned has the desirable firm brous side on the grain side of the'leather, and a more or less elastic flesh side pitted with cup-like formations; and when pig-skin leather is used, the strips are cut from the hide next to and parallel with the back bone and they therefore have a ham-end which is much firmer than the shoulder-end.

The material, no matter how produced, requires to bejoined into a continuous belt, and

in .making the joint 'the ends to be united are beveled for the lap and are then lapped 'and cemented together. In making the la for the -joint the feather exige, upon the so t side of the material in particular, is cut away as shown at a Fig. 1, by a reverse bevel to secure a stronger part of the material.

In joints for connecting hog-skin stripsl the bevel is made so the ham-end underlies the shoulder-end, which is important in that the hard side of the shoulder-end is left intact and its weaker inner portion removed;

and the inner ,portion of the ham-end is Another object is to utilize a natural prodallowed to remain because it is the stronger in the two ends. v

The ,material thus formed for the completed belt is bent longitudinally midway of the edges of the firm .outer surface into V- shape in cross section. As the belt passes .over a pulley the two sides of the V tryT to expand or Hatten out, thereby grippin both sides of the groove of the pulley 9 whi e also making contact with the bottom of the groove. y'Ihe vacuum-cups assist in gripping at all points of contact'and they also provide' room for the displacement of material as thev belt conforms wlth the curves of 'the pulley.

The elasticity of the belt not only aids 1n causing the belt to gf releases the belt wit out consuming power to pull it out of the groove and reduces the de-y the other, said belt having a pulley-contact-- ing surface of less compactness than the opposit@ belt surface, said sections being united ip the pulley but it also asl by lapped joints formed by beveling the rmer ends of the sections to an edge on the less firm side and b correspondingly beveling the less lirm en s on their firmer sides.

2. A belt for grooved pulleys, V-sha e in cross section, formed of a pluralit ov sections of greater irmness at one en than at the other, said bell'l having a pulley-contacting surface of less compatness than the 0pposite belt surface, said sections bein united by lapped joints formed by bevellng the firmer ends of the sections to a thin edge on the less firm side and reversely for the correspondino bevel of the less firm ends said thin edge lbeing removed before the ends are joined.

3. A beltin the form of a. hollow V in cross section made from ho -skin.

4:. A belt, in the form o a hollow V in cross section made from hog-skin out in strips from shoulder to ham with the shoulder-end of one strip joined to the ham-end of the next strip.

Signed at Indianapolis, Indiana, this the 23d day of May, 1921.

HAROLD M. GUSDORF. 

